| Person | Type | Job | Role(s) |
|---|---|---|---|
 Arthur Conan Doyle | Crew | Writing | Story |
 Bernard B. Brown | Crew | Sound | Sound Director |
Carmen Dirigo | Crew | Costume & Make-Up | Hairstylist |
Edward R. Robinson | Crew | Art | Set Decoration |
Frank Gruber | Crew | Writing | Adaptation |
Howard Benedict | Crew | Production | Executive Producer |
Jack Otterson | Crew | Art | Art Direction |
 Jack Pierce | Crew | Costume & Make-Up | Makeup Department Head |
Leonard Lee | Crew | Writing | Screenplay |
Martin Obzina | Crew | Art | Art Direction |
Maury Gertsman | Crew | Camera | Director of Photography |
Milton Rosen | Crew | Sound | Music Director |
 Roy William Neill | Crew | Directing | Director, Producer |
Russell A. Gausman | Crew | Art | Set Decoration |
Saul A. Goodkind | Crew | Editing | Editor |
Vera West | Crew | Costume & Make-Up | Costume Design |
Alexander Pollard | Cast | Crabtree's Assistant at Auction (uncredited) | |
 Basil Rathbone | Cast | Actor | Sherlock Holmes |
Bobby Hale | Cast | Actor | Pub Patron (uncredited) |
 Carl Harbord | Cast | Actor | Inspector Hopkins |
 Charlie Hall | Cast | Actor | Cab Driver (uncredited) |
 Cyril Delevanti | Cast | Actor | Convict at Dartmoor Prison (uncredited) |
 Edmund Breon | Cast | Actor | Julian 'Stinky' Emery |
 Frank Baker | Cast | Actor | Photographer |
 Frank Mills | Cast | Actor | Pub Patron (uncredited) |
 Frederick Worlock | Cast | Actor | Colonel Cavanaugh |
 Harry Cording | Cast | Actor | Hamid |
 Holmes Herbert | Cast | Actor | Ebenezer Crabtree |
 Ian Wolfe | Cast | Actor | Commissioner of Scotland Yard |
 Jack Curtis | Cast | Actor | Pub Patron (uncredited) |
 Leyland Hodgson | Cast | Actor | Tour Guide |
 Lillian Bronson | Cast | Actress | Minister's Wife (uncredited) |
 Marjorie Bennett | Cast | Actress | Antique Shop Assistant (uncredited) |
 Mary Gordon | Cast | Actress | Mrs. Hudson |
 Nigel Bruce | Cast | Actor | Dr. John H. Watson |
 Olaf Hytten | Cast | Actor | Alfred - Auction House Bookkeeper (uncredited) |
Patricia Cameron | Cast | Actress | Evelyn Clifford |
 Patricia Morison | Cast | Actress | Mrs. Hilda Courtney |
 Sally Shepherd | Cast | Actress | |
Wallace Scott | Cast | Actor | Joe Cisto |
 William H. O'Brien | Cast | Actor | Detective at Murder Scene |
| Person | Type | Job | Role(s) |
